Update azure-machine-learning-release-notes.md

Author: harneetvirk

articles/machine-learning/azure-machine-learning-release-notes.md

@@ -24,8 +24,6 @@ See [the list of known issues](resource-known-issues.md) to learn about known bu
 + **New features**
   + AmlCompute clusters now support setting up a managed identity on the cluster at the time of provisioning. Just specify whether you would like to use a system-assigned identity or a user-assigned identity, and pass an identityId in the case of the latter. You can then setup permissiosn to access various resources like Storage or ACR in a way that the identity of the compute gets used to securely access the data, instead of a token based approach that AmlCompute employs today. Check out our SDK reference for more information on the parameters.
 
-  + **Preview features**
-    + [Contrib features below] 
 
 + **Breaking changes**
   + AmlCompute clusters supported a Preview feature around run-based creation, that we are planning on deprecating in two weeks. You can continue to create persistent compute targets as always by using the Amlcompute class, but the specific approach of specifying the identifier "amlcompute" as the compute target in run config will not be supported in the near future.